What potential issue could arise from the comparison in the PHP code snippet regarding the month input?

The potential issue that could arise from the comparison in the PHP code snippet regarding the month input is that the comparison is case-sensitive. This means that if the user enters "January" with a capital letter, the comparison may not match the lowercase "january" in the switch case statement. To solve this issue, you can convert the user input to lowercase before comparing it in the switch case statement.

$user_input = strtolower($_POST['month']);

switch ($user_input) {
    case 'january':
        echo "January selected";
        break;
    case 'february':
        echo "February selected";
        break;
    // Add more cases for other months
    default:
        echo "Invalid month selected";
}